Bose-Einstein condensation of photons

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Title: Bose-Einstein condensation of photons
Authors: Marelic, Jakov
Item Type: Thesis or dissertation
Abstract: A Bose-Einstein condensate can be made of photons. The photons are held at thermodynamic equilibrium in a dye-filled microcavity and pumped with a laser. Thermalisation can be demonstrated and above the threshold a Bose-Einstein condensate will form. A Mach-Zehnder interferometer is built and used to measure the spatial and temporal first-order coherence under various conditions. We build a momentum-resolved spectrometer and use it to obtain views into the phase-space distribution of the photon condensate. We put an upper bound on the value of the interaction strength parameter and find that the microcavity system is ergodic even when not at thermal equilibrium. We build a setup to stabilise the pump laser power with the aim to observe the λ-point of the condensate.
Content Version: Open Access
Issue Date: Oct-2017
Date Awarded: May-2018
URI: http://hdl.handle.net/10044/1/59351
DOI: https://doi.org/10.25560/59351
Supervisor: Nyman, Robert
Hinds, Edward
Sponsor/Funder: Engineering and Physical Sciences Research Council
Department: Physics
Publisher: Imperial College London
Qualification Level: Doctoral
Qualification Name: Doctor of Philosophy (PhD)
Appears in Collections:Physics PhD theses



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